Defty, E., S. Hatt, M. Thulin, H. Lidetu, and I. Darbyshire. “A Taxonomic Revision of the ‘Quadrispina clade’ of Barleria Sect. Prionitis”. Webbia, vol. 80, no. 2, Nov. 2025, pp. 93-120, doi:10.36253/jopt-19147.